PHP之mb_strpos使用,phpmb_strpos
mb_strpos
- (PHP 4 >= 4.0.6, PHP 5, PHP 7)
- mb_strpos — Find position of first occurrence of string in a string
- mb_strpos — 查找字符串在另一个字符串中首次出现的位置
Description
int mb_strpos (
string $haystack ,
string $needle [,
int $offset = 0 [,
string $encoding = mb_internal_encoding() ]]
)
Parameters
haystack
- The string being checked.
- 要被检查的 string。
needle
- The string to find in haystack. In contrast with strpos(), numeric values are not applied as the ordinal value of a character.
- 在 haystack 中查找这个字符串。 和 strpos() 不同的是,数字的值不会被当做字符的顺序值。
offset
- The search offset. If it is not specified, 0 is used. A negative offset counts from the end of the string.
- 搜索位置的偏移。如果没有提供该参数,将会使用 0。负数的 offset 会从字符串尾部开始统计。
encoding
- The encoding parameter is the character encoding. If it is omitted, the internal character encoding value will be used.
- encoding 参数为字符编码。如果省略,则使用内部字符编码。
Return Values
- Returns the numeric position of the first occurrence of needle in the haystack string. If needle is not found, it returns FALSE.
- 返回 string 的 haystack 中 needle 首次出现位置的数值。 如果没有找到 needle,它将返回 FALSE。
Example
<?php
$str = "Hello World! Hello PHP";
$pos = mb_strpos( $str, "Hello", 0, mb_internal_encoding() );
echo $pos . PHP_EOL;
$pos = mb_strpos( $str, "Hello", 2, mb_internal_encoding() );
echo $pos . PHP_EOL;
function mb_str_replace( $haystack, $search, $replace, $offset = 0, $encoding = 'auto' ) {
$len_sch = mb_strlen( $search, $encoding );
$len_rep = mb_strlen( $replace, $encoding );
while ( ( $offset = mb_strpos( $haystack, $search, $offset, $encoding ) ) !== false ) {
$haystack = mb_substr( $haystack, 0, $offset, $encoding )
. $replace
. mb_substr( $haystack, $offset + $len_sch,
$le = mb_strlen( $haystack ) - mb_strlen( $search ) + mb_strlen( $replace ),
$encoding );
$offset = $offset + $len_rep;
if ( $offset > mb_strlen( $haystack, $encoding ) ) {
break;
}
}
return $haystack;
}
$replace = mb_str_replace( "hello world !hello world !hello world !hello world !", "hello", "hi" );
echo $replace . PHP_EOL;
echo mb_str_replace( $replace, "world", "PHP" ) . PHP_EOL;
echo mb_str_replace( $replace, " ", "-" ) . PHP_EOL;
echo mb_str_replace( "PHP是世界上最好的语言������������", '��', '��', 0, mb_internal_encoding() ) . PHP_EOL;
echo mb_str_replace( "112233445566", '22', '00' ) . PHP_EOL;
echo mb_str_replace( '��������', '��', '��1', 2, mb_internal_encoding() ) . PHP_EOL;
echo mb_str_replace( '1111', '111', '0', 1 ) . PHP_EOL;
echo mb_strlen( '��������' ) . PHP_EOL;
echo mb_str_replace( '软件开发软件', '软件', '代码' ,0,mb_internal_encoding()) . PHP_EOL;
echo mb_str_replace( '软件开发软件', '软件', '代码' ) . PHP_EOL;
文章参考
- http://php.net/manual/en/function.mb-strpos.php
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